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This commit is contained in:
BZLZHH
2026-01-31 22:58:22 +08:00
parent 00679642d6
commit 7918300848
46 changed files with 735 additions and 629 deletions
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MobileGL/MG_Util/ShaderTranspiler/SpirvPasses/EliminateFloatEqualsZeroPass.cpp
+19 -32
View File
@@ -1,4 +1,4 @@
// MobileGL - MobileGL/MG_Util/ShaderTranspiler/FloatEqualsZeroEliminationPass.cpp
// MobileGL - MobileGL/MG_Util/ShaderTranspiler/SpirvPasses/EliminateFloatEqualsZeroPass.cpp
// Copyright (c) 2025-2026 MobileGL-Dev
// Licensed under the GNU Lesser General Public License v3.0:
// https://www.gnu.org/licenses/gpl-3.0.txt
@@ -39,7 +39,7 @@ namespace MobileGL {
// 3. iterate all function -> basic block -> insn
for (auto& func : *get_module()) {
for (auto& bb : func) {
for (auto itInst = bb.begin(); itInst != bb.end(); ) {
for (auto itInst = bb.begin(); itInst != bb.end();) {
auto& inst = *itInst;
bool shouldSkip = true;
@@ -48,14 +48,14 @@ namespace MobileGL {
// `OpFOrdNotEqual` or `OpFUnordNotEqual`,
// simply skip if irrelevant
switch (inst.opcode()) {
case spv::Op::OpFOrdEqual:
case spv::Op::OpFUnordEqual:
case spv::Op::OpFOrdNotEqual:
case spv::Op::OpFUnordNotEqual:
shouldSkip = false;
break;
default:
break;
case spv::Op::OpFOrdEqual:
case spv::Op::OpFUnordEqual:
case spv::Op::OpFOrdNotEqual:
case spv::Op::OpFUnordNotEqual:
shouldSkip = false;
break;
default:
break;
}
if (shouldSkip) {
@@ -96,18 +96,13 @@ namespace MobileGL {
// 2. Create constant ID for `Epsilon`
const analysis::Constant* eps_const = const_mgr->GetConstant(
type_mgr->GetType(float_type_id),
{*(reinterpret_cast<const uint32_t*>(&K_EPSILON))}
);
type_mgr->GetType(float_type_id), {*(reinterpret_cast<const uint32_t*>(&K_EPSILON))});
uint32_t eps_id = const_mgr->GetDefiningInstruction(eps_const)->result_id();
// 3. Build Abs(x) inst
// OpExtInst %float_type %glsl_import Abs %x
InstructionBuilder builder(
context(),
&inst,
IRContext::kAnalysisDefUse | IRContext::kAnalysisInstrToBlockMapping
);
context(), &inst, IRContext::kAnalysisDefUse | IRContext::kAnalysisInstrToBlockMapping);
std::vector<Operand> abs_operands;
abs_operands.push_back({SPV_OPERAND_TYPE_ID, {glsl_std_450_id}});
@@ -117,12 +112,7 @@ namespace MobileGL {
// In GLSL.std.450, `FAbs`'s OpCode == 4
// Ref: https://registry.khronos.org/SPIR-V/specs/1.0/GLSL.std.450.html
Instruction* abs_inst = builder.AddInstruction(MakeUnique<Instruction>(
context(),
spv::Op::OpExtInst,
float_type_id,
context()->TakeNextId(),
abs_operands
));
context(), spv::Op::OpExtInst, float_type_id, context()->TakeNextId(), abs_operands));
// 4. build Abs(x) < Epsilon
// OpFOrdLessThan %bool_type %abs_val %eps
@@ -130,14 +120,11 @@ namespace MobileGL {
less_operands.push_back({SPV_OPERAND_TYPE_ID, {abs_inst->result_id()}});
less_operands.push_back({SPV_OPERAND_TYPE_ID, {eps_id}});
bool isEqualOp = (inst.opcode() == spv::Op::OpFOrdEqual || inst.opcode() == spv::Op::OpFUnordEqual);
bool isEqualOp =
(inst.opcode() == spv::Op::OpFOrdEqual || inst.opcode() == spv::Op::OpFUnordEqual);
Instruction* less_than_inst = builder.AddInstruction(MakeUnique<Instruction>(
context(),
isEqualOp ? spv::Op::OpFOrdLessThan : spv::Op::OpFOrdGreaterThanEqual,
bool_type_id,
context()->TakeNextId(),
less_operands
));
context(), isEqualOp ? spv::Op::OpFOrdLessThan : spv::Op::OpFOrdGreaterThanEqual,
bool_type_id, context()->TakeNextId(), less_operands));
// 5. Replaces all uses of old insn with new one
context()->ReplaceAllUsesWith(inst.result_id(), less_than_inst->result_id());
@@ -161,5 +148,5 @@ namespace MobileGL {
return spvtools::Optimizer::PassToken(MakeUnique<EliminateFloatEqualsZeroPass>());
}
} // namespace ShaderTranspiler
}
}
} // namespace MG_Util
} // namespace MobileGL